Stone-working tool.



L. W. GREVB C. B. RICHARDS STONEWORKIHG TOOL,

APPLIOATIOH FILED DEO.28,1907.

Patented Nov. 24:, 1908.

WITNESSES:

LOUIS W. GREVE n Li Y D l .7 commit",

p eciliea'tion of Letters Patent.

' LYING TOOL.

it OFFICE.

OF CLEVELAND, OHIO, A CORPORATION OF Patented. Nov. 24, 1908 Application:zlez't December 23, 1907. Serial No. 408,363

lie it known that We. Q

.1, county of n have inventg is a sptwilh iinoiple of the in'ventutwinewined and he 1, i ,1 A .\r

i re I reinowor end ot a A must. tool and a 'ii-oit in the lower end ofthe s and. provided with our improvement tit axial seci neninatio inr .Lshowing; another vilt H 'ial passage in tool or plug my; out thenghylinder of en 3s the reterence ortion ot the pisproveinonts in menthe tollow- This casing is formed With two annular i GKEVE and grooves,l] in its interior bore winch rooves a w 1 I i, 7 a

the United are separated by a central annular rib, 12, which rib has agreater interior diameter than the exterior diameter of the enlargedportion of the drill-bit. An annular chamher is thus formed around theenlarged portion of the drill-bit and Within the surrounding casing. Aninlet-opening, 13, is formed in the side of the casing and through theannular rib. Gaskets, 14, which are folded double so as to he U-shapedin cross-section are placed within the annular grooves 11, so as to formpackings tor the annular chamber with. the flanges pointing inward, soas to be tightened by internal pressure in the chamber.

in the form illustrated in Fig. I, the Gas ing is separate from thetool-nose and is fitted around the enlarged portion of the drill-hit andis formed with an internally threaded nipple, 15, into which thethreaded ipple upon the end of a water-hose may be screwed In thetor-1nillustrated in Fig. I, the inlet of the casing is connected to theWater supply through the flexible hosescrewed into the nipple and theentire tool and bit may be rotated without affecting the hose, inasmuchas the drill-bit is free to rotate Within the casing, thus preventingobstruction to rotation by the hose.

In the form illustrated in Fig. II of the drawings, the casing 9 isintegral Wi h the tool-nose 3 and the lnnnmer-cylinderiis extended downaround the casinq. A' tvaterchannel, 16, extends from the upper ml ofthe cylinder, down through the side f the same and into the extension,and ope into the annular rib 12 to communicate w th the inlet-opening13, formed between th annular grooves 11 having the gask ts 14. All ofthese parts are identical in construction and function with thecorresponding parts of the tool illustrated in Fig. I, indicated by samenumerals without the qualifying letter a.

In the form illustrated in F ig. II, the water-hose conneeted to theWater-channel at the super end of the hammer cylinder,

o'- g which isintegral with the cylinder is rotated or oscillated inwith entire toot. i

Other modes of applying the principle of our invention may be employedfor the mode herein explained. Change may therefore be made as regardsthe mechanism thus disclosed, provided the principles of constructionset forth respectively in the following claims are employed.

We therefore particularly point out and water-passage and a passageradiating from the upper end of said axial passage out through the sideof the drill-bit, of a casing surrounding the drill-bit and formed withtwo annular grooves and a central annular rib of greater internaldiameter than the diameter of the drill-bit, and with a waterinletthrough said rib and registering with the radial passage, and gasketsU-shaped in cross-section and located in the annular grooves with theirflanges pointing inward.

2. The combination with a pneumatic hammer and a drill-bit inserted inthe tool nose of said hammer and formed with an enlargement immediatelyadjoining the shank and an annular shoulder at the lower portion of theenlargement and formed with an axial waterpassage and with a radialwater-passage extending from the upper end of the axial passage outthrough the middle of the enlargement, of a'casing surrounding theenlargement and formed with two anannular grooves with their flangespointing inward 3. The combination with a pneuniati hammer and adrill-bit formed with an enlargement adjoining the shank and with anannular rib the lower end of the enlargement, of a casing surroundingthe eniargement to allow the drill-bit to he rotated within it andformed with two interior annular grooves and with an annular rih betweensaid grooves and of greater internal diameter than the external diameterof the enlargement and with. a lateral nipple having a water-passage tothe interior of the casing through the annular rib to which nipple awater-hose may be connected, and gaskets in the grooves of the casingUshaped in cross-section and having their flanges pointing inward.

In testimony that we claim. the foregoing to be our invention We havehereunto set our hands this 2nd day of December A. D. 1907.

Witnesses T W -T A 9,?- LJGlYJJLLLii; W a

o, i riaLL.

